#include <iostream>

using namespace std;

int main()
{
	int cnt = 0, 		// Count of numbers read.
	    tot = 0;		// Total of numbers read.
	int num;		// Input number.

	// Read until a read fails.
	while(cin >> num) {
		tot += num;
		++cnt;
	}

	/* Print the average. */
	if(cnt)
		cout << "Average is " << (double)tot /	(double)cnt << endl;
	else
		cout << "No numbers." << endl; 
}